Flash ads patterns

Looking at someone's or companies flash ad portfolio, I noticed that a lot of the ones they showed were longer than I would expect them to be but they did have a a lot of info to doll out and the words often slid in there ads as well. Also they used more static images and the images would change kind of like a slideshow a certain extent and most of those were more square than a long rectangle. They often looped but these ads were more in the category of popup ads then one the companies official site which is what were tasked to do for our site.